| Redding to Olympia (Washington) | 447.94 mi (720.90 km) |
| Redding to Olympia Heights (Florida) | 2,608.63 mi (4,198.18 km) |
| Redding to Omaha (Nebraska) | 1,369.37 mi (2,203.79 km) |
| Redding to On Top of the World Designated Place (Florida) | 2,383.27 mi (3,835.50 km) |
| Redding to Onalaska (Wisconsin) | 1,600.78 mi (2,576.20 km) |
| Redding to Oneida (New York) | 2,379.71 mi (3,829.78 km) |
| Redding to Oneonta (New York) | 2,418.66 mi (3,892.45 km) |
| Redding to Ontario (California) | 521.32 mi (838.98 km) |
| Redding to Ontario (Oregon) | 364.37 mi (586.40 km) |
| Redding to Opa-locka (Florida) | 2,606.21 mi (4,194.29 km) |
| Redding to Opelika (Alabama) | 2,106.04 mi (3,389.35 km) |
| Redding to Opelousas (Louisiana) | 1,826.99 mi (2,940.26 km) |
| Redding to Orange (California) | 529.97 mi (852.91 km) |
| Redding to Orange (Texas) | 1,755.94 mi (2,825.92 km) |
| Redding to Orange City (Florida) | 2,441.31 mi (3,928.91 km) |
